Basic Level     Skills: Not specified    
Author
Author email
bhargav.ajay@gmail.com
Author website
www.rickeyworld.info

Description



DS1307 is a hardware realtime clock, which works on I2C protocol. Better graphics using the same old fashioned alphanumeric LCD (type HD44780). Icons which shows the status for Alarm ON/OFF state, which gives a nice and cute look to the clock.

There are four switches connected to the uC, as shown in the figure. Function of the keys are same as clear from their names.

When the power supply is switched on it will give you the default date and time, but later you can change it to the desired value. After setting once, the backup battery will keep the clock ticking even after the power is not there.

A little about I2C:
There are basically four main conditions in I2C protocol.
1) Start Condition
2)Stop Condition
3)Data Validity
4)Acknowledgement

1)Start Condition:
when SCL is high and SDA H->L, will be taken as start condition for the communication.
2)Stop Condition:
when SCL is high and SDA L->H, will generate a stop condition.
3)Data Validity:
When SCL is high there should be no chande in SDA line only then the data is valid, the data change should be made only when SCL is low.
4)Acknowledgement:

After sending of one byte of data the reciever has to acknowledge the sender for the successful reception. for this the sender make the SDA line high and reciever pulls down the SDA low, which tells the sender that data has reached safely.

Now the source code written in assembly, basically implements the I2C protocol. the assembly source written for Keil download here clock.asm and the direct hex file for programming the controller from here clock.hex. The schematic for the Digital clock is available in PDF format can be downloaded from here clock.pdf.

Project code has been revised and updated. Bug fixes regarding corrupt display.

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First Upload date:
08/05/2006
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pravin_35 Avatar
Posted By pravin_35
Wed Jul 23 2014, 11:53 AM
Can the Pickit3 read the Pics signature bytes and ...
diana1234 Avatar
Posted By diana1234
Wed Jul 23 2014, 07:20 AM
@ Ajay sirMay be there is power supply problem i t...
pravin_35 Avatar
Posted By pravin_35
Wed Jul 23 2014, 04:29 AM
Hi, Need library or sample code for PIC16f882,, Do...
Anup Teke Avatar
Posted By Anup Teke
Wed Jul 23 2014, 03:28 AM
Sir,I was doing like thisMCP3901_CS = 0;WriteSPI1(0x01);TempData = ReadSPI1( );TempData <<= 8;TempData |= ReadSPI1( );TempData <<= 8;TempData |= ReadSPI1( );MCP3901_CS = 1;and my problem solved by doing like thisMCP3901_CS = 0; WriteSPI1(0x01); TempData = ReadSPI1( ); TempData <<= 8; MCP3901_CS = 1; MCP3901_CS = 0; WriteSPI1(0x03); TempData |= ReadSPI1( ); TempData <<= 8; MCP3901_CS = 1; MCP3901_CS = 0; WriteSPI1(0x05); TempData |= ReadSPI1( ); MCP3901_CS = 1;
pravin_35 Avatar
Posted By pravin_35
Wed Jul 23 2014, 12:57 AM
Can the Pickit3 read the Pics signature bytes and ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jul 22 2014, 04:24 PM
Can the Pickit3 read the Pics signature bytes and ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jul 22 2014, 04:16 PM
Does the DS1307 keep time ?That is, if you set it ...
pravin_35 Avatar
Posted By pravin_35
Tue Jul 22 2014, 01:05 PM
hi... i have done with a simple blinky program wi...
pravin_35 Avatar
Posted By pravin_35
Tue Jul 22 2014, 07:23 AM
Autoscale does not know what settings you keep on ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Jul 22 2014, 02:19 AM
[Topic moved to PIC Microcontroller Discussion For...

Conversation

Wed Jul 23 2014, 05:49 AM
R.ABHISHEK
sir,pls message on microcontroller 8051 assambly language new program
Wed Jul 23 2014, 05:47 AM
R.ABHISHEK
sir,pls message on 8051 microcontroller assambly language program new quastions
ajay_bhargav
Tue Jul 22 2014, 09:18 AM
@Pragya Android application is taken from google play. Only Author has its source with him. Application is only used in this project.
Tue Jul 22 2014, 04:58 AM
Pragya
plz send me 8051 code and android code for android based device controller via Bluetooth .Here in this project I am using Hc-06 Bluetooth module
Thu Jul 10 2014, 09:57 AM
Caleb
plz someone mail me the source code for that project
Thu Jul 10 2014, 09:57 AM
Caleb
http://www.8051projects.net/download-d188-control-your-pc-tv-remote.html
ExperimenterUK
Tue Jul 08 2014, 03:25 PM
Post questions in the forum.. this area is for chat
Tue Jul 08 2014, 08:15 AM
P.Panchanyam
Sir i want some new ideas for my final year projects ,which would help for our soceity in future
Tue Jul 08 2014, 01:39 AM
jasvinder
Dear Sir Ref. to the discussion held with under sign, the detail is as under--- We are in weighing scale field since 1986. We are assembling the scales by purchasing the material from out source ( From India and other countries). Now we decide to make our own Card in our decided shape. So we want to develop a universal card , which we can make all types of scales of up 100000 counts with 7 segment LED Display . Also with other features like Printing, Counting, RS232 Etc. And Three Pass words at different levels. And we can edit the Softwear. What else you can provide in this field, also mention. We will pay you the development , softwear and testing charges. And up-gradation charges at time to time. Our web site is modern-scales.com Kindly revert.
Mon Jul 07 2014, 09:20 AM
tadashige matuda
Please tell me about pic instruction ADDWF fileName,f ; fileName=fileName+W. Why twice memory access (1)fileName+W,(2)fileName=fileName+W, be able in one instruction cycle. For MOVWF fileName ; memory access once in an one instruction cycle.

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vinosentinal
Mon Jul 21 2014, 08:28 PM
niks_here
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athiramsankar
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nagarajan.electro
Sat Jul 19 2014, 12:49 AM
praru
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Thu Jul 10 2014, 05:50 AM

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